I am preparing a geometry on Flair.
I need to drawing geometry like drawing in Solidworks. Is there any way to solve this problem directly? or I must draw again?
Solidworks is a CAD software. Neither Fluka nor Flair are. If you want to create a geometry in Fluka you have to follow its rules and requirements.
Have a look at the lectures on the geometry and the geometry editor to understand how to build geometriyes.